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MC79L05ACDR
Texas Instruments
IC REG LINEAR -5V 100MA 8SOIC
5000147 Pcs New Original In Stock
Linear Voltage Regulator IC Negative Fixed 1 Output 100mA 8-SOIC
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5.0 / 5.0
- (470 Ratings)
MC79L05ACDR
Product Overview
1368010
DiGi Electronics Part Number
MC79L05ACDR-DGManufacturer
Texas Instruments
MC79L05ACDR
Description
IC REG LINEAR -5V 100MA 8SOICInventory
5000147 Pcs New Original In Stock
Linear Voltage Regulator IC Negative Fixed 1 Output 100mA 8-SOIC
Quantity
Minimum 1
Minimum 1
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MC79L05ACDR Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Packaging
Cut Tape (CT)
Series
-
Product Status
Last Time Buy
Output Configuration
Negative
Output Type
Fixed
Number of Regulators
1
Voltage - Input (Max)
-20V
Voltage - Output (Min/Fixed)
-5V
Voltage - Output (Max)
-
Voltage Dropout (Max)
1.7V @ 40mA
Current - Output
100mA
PSRR
49dB (120Hz)
Control Features
-
Protection Features
Over Temperature, Short Circuit
Operating Temperature
0°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SOIC
Base Product Number
MC79L05
Datasheet & Documents
HTML Datasheet
MC79L05ACDR-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
296-1016-2
296-1016-1
-MC79L05ACDR-NDR
296-MC79L05ACDRCT
-MC79L05ACDRE4
-MC79L05ACDRG4
TEXTISMC79L05ACDR
296-1016-6-NDR
-296-1016-1
296-MC79L05ACDRDKR
-MC79L05ACDRG4-NDR
296-1016-6
296-1016-6INACTIVE-DG
-296-1016-1-DG
-MC79L05ACDRE4-NDR
2156-MC79L05ACDR
296-MC79L05ACDR
296-1016-6INACTIVE
296-MC79L05ACDRTR
296-1016-1-DG
296-1016-2-DG
296-1016-6-DG
Standard Package
2,500
Alternative Parts
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UNIT PRICE
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Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
항상 좋은 가격과 친절한 서비스 덕분에 망설임이 없어요.
de desembre 02, 2025
我對迪基電子的品質和服務都非常滿意，值得一再購買！
de desembre 02, 2025
Ich schätze die nachhaltige Qualität der Produkte und die kontinuierliche Unterstützung durch den Service.
de desembre 02, 2025
Quick dispatch and excellent affordability make shopping here a pleasure.
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Frequently Asked Questions (FAQ)
Can I use the MC79L05ACDR to replace an L79L05ACD13TR in a legacy industrial control board, and what are the key compatibility risks I should evaluate before making the swap?
Yes, the MC79L05ACDR from Texas Instruments is generally a drop-in replacement for the STMicroelectronics L79L05ACD13TR, as both are -5V, 100mA negative linear regulators in an 8-SOIC package with similar pinouts and thermal characteristics. However, critical differences exist: the MC79L05ACDR has a slightly higher maximum input voltage (-20V vs. -18V) and a marginally better dropout voltage (1.7V @ 40mA vs. ~2V typical), which improves headroom in low-voltage applications. Verify that your input rail does not exceed -18V if the original design relied on that limit, and confirm the PCB layout accommodates the same thermal dissipation profile. Since the MC79L05ACDR is under Last Time Buy status, ensure long-term availability aligns with your product lifecycle—consider qualifying a second source like the TPS7A3001DGNR for future designs.
What design constraints should I consider when using the MC79L05ACDR in a high-temperature automotive under-hood application where ambient temperatures may reach 110°C?
The MC79L05ACDR is rated for operation up to 125°C junction temperature, but sustained ambient temperatures near 110°C significantly reduce thermal margin and reliability. At this temperature, even minimal power dissipation (e.g., 100mA × 1.7V = 170mW) can push the junction close to its limit, especially in an 8-SOIC package with limited PCB copper area for heat spreading. You must perform detailed thermal modeling using the junction-to-ambient thermal resistance (θJA ≈ 160°C/W for 8-SOIC on minimal copper) and derate output current accordingly. Consider adding a small copper pour or thermal via array under the package. For mission-critical automotive systems, evaluate a more robust alternative like the TPS7A3001DGNR, which offers better thermal performance and integrated protection features, despite higher cost.
Is the MC79L05ACDR suitable for noise-sensitive analog front-end circuits, and how does its PSRR compare to modern low-noise alternatives like the TPS7A3001DGNR?
The MC79L05ACDR provides 49dB of power supply rejection ratio (PSRR) at 120Hz, which is adequate for basic digital or moderate-noise analog systems but insufficient for precision sensor interfaces or high-resolution ADC/DAC rails. In contrast, the TPS7A3001DGNR delivers >70dB PSRR across a broader frequency range (up to 10kHz), making it far superior for noise-critical applications. If your design includes sensitive op-amps or measurement circuitry downstream of the MC79L05ACDR, consider adding a post-regulator LC filter or switching to a low-noise LDO. The MC79L05ACDR’s PSRR rolls off quickly above a few hundred Hz, so high-frequency switching noise from nearby DC-DC converters may couple through unless carefully filtered.
Can I parallel two MC79L05ACDR devices to increase output current beyond 100mA in a cost-sensitive design, and what are the risks of current sharing imbalance?
Paralleling MC79L05ACDR regulators is not recommended due to lack of current-sharing features and inherent output voltage tolerance variations (±2% typical). Even minor differences in output voltage can cause one regulator to carry significantly more current, leading to thermal runaway and premature failure—especially since the device has over-temperature protection but no foldback current limiting. If higher current is needed, use a single higher-capability regulator such as the TPS7A3001DGNR (150mA with better thermal performance) or redesign with a switching pre-regulator followed by the MC79L05ACDR for clean output. For legacy systems where board space is constrained, adding a small ballast resistor (e.g., 0.5Ω, 1W) in series with each output can improve sharing, but this reduces efficiency and increases dropout voltage—introducing new design trade-offs.
Given that the MC79L05ACDR is under Last Time Buy status, what long-term sourcing strategy should I adopt for a product with a 5+ year lifecycle, and which substitute parts offer true second-source compatibility?
With the MC79L05ACDR in Last Time Buy phase, relying solely on existing inventory poses significant supply chain risk for long-lifecycle products. While pin-compatible substitutes like the LM79L05ACM/NOPB (Texas Instruments/National legacy) or L79L05ABD13TR (STMicroelectronics) exist, they may also face obsolescence. A more sustainable strategy is to qualify the TPS7A3001DGNR as a functional upgrade—it offers higher PSRR, better thermal performance, and active current limiting, albeit in a smaller MSOP-8 package requiring minor layout changes. Perform cross-validation testing early, especially on startup behavior and transient response. Maintain a buffer stock of MC79L05ACDR units while transitioning to the newer part, and document both options in your BOM with clear revision control to manage future redesigns efficiently.
Quality Assurance (QC)
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MC79L05ACDR CAD Models
Texas Instruments MC79L05ACDR PCB symbols & footprints
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